Warrimmal
After the events of Snowtrapped, SMG4 can't stop thinking about the events in the igloo, and SMG4 knows if he brings it up around anyone they won't care anyway. SMG3 is also having the same problem, and Bowser is taunting him over it because Mario couldn't keep his mouth shut.
One night while SMG4 is sleeping, Mario decides to call Bowser. Bowser picks up, wondering what Mario would want at this time. Mario smirks, asking if SMG3 is also asleep. Bowser says that he is, and Mario immediately hangs up, laughing evilly to himself.
Also just for your info y'all the characters in this are like nothing like themselves in the show like I tried it didn't really work...hope it doesn't really effect anything (don't think it would anyway) whatever, enjoy the...piece of writing I have created from the corner of my bedroom
Art above by @Smluther84